No no no...Walnuts are free and grow on trees!
Wall nut is what you feel when you have to pay to have your vavles blasted every 20k miles. We will call them "Wall Nut" (tm)
I have 49k miles.....on my CPO and I don't think it's covered.
but it looks as if all the other new turbo TDI cars will have this issue.....